Armaspec Self-Retention Castle Nut - Black

Manufactured by ARMASPEC
SKU: ARM6521-BLK
MPN: ARM6521-BLK
Manufactured by ARMASPEC
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$26.99

In Stock

Non-FFL orders placed before 3:30pm CST will ship same business day. Non-FFL orders placed after 3:30pm CST will be shipped the next business day. FFL orders will ship within 3 business days once transfer details are provided.

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Details

Details

The Armaspec Self-Retention Castle Nut is designed for AR-15/M4 buffer tubes and end plates, offering secure, tool-free installation with no staking or thread locker required. Its patented self-retention thread design uses thread-locking technology, ensuring a tight fit that stays locked in place and provides easy, tool-free installation. Made from 7075-T6 aluminum, this castle nut is ultra-lightweight yet strong, built to withstand harsh conditions and high round counts. The hardcoat anodized finish adds corrosion resistance, extending its lifespan and protecting it from wear.

Features:

  • Mil-Spec compatibility for AR-15/M4 buffer tubes and end plates
  • Self-retention thread design eliminates staking and thread locker
  • Tool-free installation for easy, quick setup
  • Constructed from lightweight yet durable 7075-T6 aluminum
  • Corrosion-resistant hardcoat anodized finish
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Specifications

BrandARMASPEC
ColorBlack
FinishHardcoat Anodized
MaterialAluminum - 7075-T6
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to www.P65Warnings.ca.gov.

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